A Turkish-German family of four who died while on holiday in Istanbul was likely poisoned by gas emitted from a pesticide used to treat a bug infestation in their hotel, according to a preliminary autopsy report cited by Turkey's state-run news agency.

The Bocek family had arrived from Germany and were staying at a hotel in Istanbul's Fatih district. They fell ill on Nov. 12 and went to a hospital by taxi for treatment before returning to the hotel. They became sick again the following day and were taken to the hospital by ambulance.

The children — Kadir Muhammet, 6, and Masal, 3 — died that day. Their mother, Cigdem, died on Nov. 14, while their father, Servet, died on Nov. 17.

A preliminary report submitted to the prosecutor's office found there was phosphine gas, an insectic

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